Combined furnace and boiler and steam-superheater.



c. 9. FORWARD. COMBINED FURNACE AND BQILER AND STEAM SUPERHEATER.

Patented J an. 1, 1918.

PA oFFrc CHAUHCEY B. FORWARD, 0F UBBANA, OHIO. comrimn FURNACE AND BOILER AND STE AM-BUPEBHEATEE.

Toall'wkom it ma concern: Be it.known t at I, CH-AUNCY B. Fox- WARD, citizen of the United States, residing at Urbana, in the county of Champaign and State of Ohio, have invented -certain new and useful Improvements in Combined Furnaces and Boilers and Steam-superheaters, of which the following is a specification.

My invention has reference to a steam boiler and superheater, and the object of the invention is to provide means to obtain and maintain a high superheat with a minimumof wear and repair to the boiler and superheating coils, said means involving the use of an auxilia superheating coil in a particular way an relation substantially as herein shown and described and more particularly pointed out inv the claims. The invention is of especial utility in connection with my apparatus for refining oils as shown and described in another application filed concurrently herewith and bearing,Serial Number 174457, but is not necessarily limited to such useand apparatus.

In the accompanying drawings, Figure 1 I Q. is a sectional elevation front to rear of a high pressure steam boiler and superheater constructed according to my invention. Fig. 2 is a sectional elevation of'the said parts at right angles to Fig. land corresponding substantially to the 1rregular line 22 on said figure.

As thus shown, the steam boiler B in its entirety consists of the furnace walls F and the drums 2 and connecting tubes 3 supported within said walls above the bridge wall W and arch A and the grates G. This particular boiler also has its water tubes extending in incline relation to the bridge wall and is separated at intervals by division walls D to produce a circuitous travel of the heat generated within the furnace, and the area of highest temperature is ap- 45 proximately at the throat T between arch A- and the bridge wall. The steam superheater set into this organism is of a dual character and comprises a primary heater 4 made of coils of pipe and a secondary or auxiliary coil heater 5 with a pipe 7 con 'nectin said members to convey the steam from t e rima heater to the secondary heater whlle a pipe 6 from the uppermost drum 2 feeds the ste under pressure to the primary heater 4. The discharge of the superhsteam ham secondary Specification of Letters ratent. Application filed June 1:, 1017. Serial No. 174,456.

to the direct heat from the rebounds from the wall w and flows upward Patented Jan. 1, 1918.

heater 5 is by pipe 8 from the secondary heater shown herein but may, as an example, be supposed to be a hydrocarbon oil heating and separating apparatus as shown and de scribed in my co-pending application above set forth.

The superheaters 4 and 5 operate together more effectively to superheat the steam than whereonly a single superheating coil 4 is used in the flue between the tubes about wall D, or where only a single heating coil 5 is placed in the throat T. It must be understood that operations proceed under high pressure and temperatures, and if super-' heater 4 were relied upon alone a higher degree of firing would be required, or if this large main coil 4 were used at the throat T, the throat would 1 be choked. Moreover, the secondary coil 5 is in an area of higher temperature than primary coil 4, and for that reason the main coil 4 will last longer and the wear fall upon the smaller coil 5 which is in a convenient place to be repaired or removed and replaced.

The best working position of secondary coil 5 is also easily ascertained for any given need that is, it may be placed nearer to or farther from throat T to superheat the steam to a temperature which will combine with the high pressure needed for my purpose. In this way, the secondary superheater 5 supplements the primary heater 4 to give the maximum pressure and superheat with the most economical fuel consumption and a minimum of repair and cost of maintenance.

In respect to. location of the primary superheating coil 4, it will be noticed that it overhangs the top of the first of the two baflie walls D and in such manner that it is exposed directly to the heat flowing over the top of said wall, and the secondary or auxiliary coil 5 lies beneath or in front of thelower and inner bank of circulatin pipes or' tubes 3 of the boiler and .in suc position thereto and to the arch of the furnace over the grate bars G and in-respect to throat T that the entire coil is exposed furnace, as it along the bank of boiler tubes 3 under which the said secondary coil is located.

What I claim is: 1. A furnace having an inclosin wall and a ateamboiler. therein-having a. p urality of to the place of use, which is not 522 aaeiseo banks of steam circulating tubes and battles between the same successively, in combination with steam superheating units consisting each of coils of pipe having pipe connection and one of sad coils located behind the front bank of boiler tubes and relatively over the first of said baflies and the other coil in the throat of the furnace across the front of said first bank of tubes.

2. A furnace'having an inclosing wallv and a steam boiler therein comprisin a bination with a primary and a secondary superheating unit consisting each of coils in of p1pe having pipe connection and the said prlmary unit dlsposed between the first and the second banks of tubes and over the to of the bafie intervening said tubes and wit a portion at either side thereof, and the 20 secondary coil disposed across the front of the first bank of tubes at the inner end of the wall over the fire grate and relatively at the point of greatest heat.

Slgned at Cleveland, in the county of 25 Guyahoga, and State of Ohio, this 8th day of June, 1917.

7 CHAUNCY B. FQRWARD. 

